¹⁹F‐NMR‐ und IR‐spektroskopische Untersuchungen an Organofluor‐silanen und ‐germanen

Exploring the Versatility of the Amidation of Aryl Acid Fluorides using the Germylamines R3GeNMe2

“…The 19 F NMR spectrum of 9 contains a singlet at δ −222.7 ppm that is shifted upfield from those of Ph 3 GeF, Bu n 3 GeF, Pr n 3 GeF, Et 3 GeF, and Me 3 GeF at δ −202.3, [65,66] −208.9, [64] −207.7, [67] −213.2, [64] and −188.6 [67] ppm, respectively, due to the higher shielding effects of the iso ‐propyl groups versus the phenyl or non‐branched alkyl groups. The 19 F NMR spectrum also contains a second feature δ −175.2 ppm that can be attributed to the polymeric structure shown in Scheme 8.…”

Pyridinium–phosphonium dications: highly electrophilic phosphorus-based Lewis acid catalysts

“…After 24 h at ambient temperature, disappearance of the starting material and the formation of a new singlet at δ = −5.3 ppm was seen. For the cation 2a, the 19 F NMR spectrum (CD 2 Cl 2 ) of the crude mixture, shows a singlet resonance at δ = −79.0 ppm and a multiplet at δ = −175.9 ppm corresponding to the O 3 SCF 3 anion and Et 3 SiF, 34 respectively. Independent synthesis confirmed the cation to be [(o-HNC 5 H 4 )PPh 2 ] + .…”

Rhodium-Catalyzed Synthesis of Diaryl Sulfides Using Aryl Fluorides and Sulfur/Organopolysulfides

“…The reaction proceeded effectively using only a small excess of sulfur. The added tributylsilane was converted to tributylsilyl fluoride in 59% yield, which was confirmed by 19 F NMR d −174.6 (quintet, J = 6.0 Hz) and HRMS 218.1852 (calcd for C 12 H 27 FSi 218.1866) . A trace amount of 2e was obtained without using tributylsilane.…”